package com.micro.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.micro.eduservice.entity.EduSubject;
import com.micro.eduservice.entity.excel.SubjectData;
import com.micro.eduservice.mapper.EduSubjectMapper;
import com.micro.eduservice.service.EduSubjectService;
import com.micro.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.springframework.beans.factory.annotation.Autowired;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    

      //因为SubjectExcelListener不交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;
    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

     //读取excel内容，一行一行进行读取,保证内存的大小
     @Override
     public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
         if(subjectData == null) {
             throw new GuliException(20001,"文件数据为空");
         }
 
         //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
         //判断一级分类是否重复
         EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
         if(existOneSubject == null) { //没有相同一级分类，进行添加
             existOneSubject = new EduSubject();
             existOneSubject.setParentId("0");
             existOneSubject.setTitle(subjectData.getOneSubjectName());//一级分类名称
             subjectService.save(existOneSubject);
         }
 
         //获取一级分类id值
         String pid = existOneSubject.getId();
 
         //添加二级分类
         //判断二级分类是否重复
         EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
         if(existTwoSubject == null) {
             existTwoSubject = new EduSubject();
             existTwoSubject.setParentId(pid);
             existTwoSubject.setTitle(subjectData.getTwoSubjectName());//二级分类名称
             subjectService.save(existTwoSubject);
         }
     }
 
     //判断一级分类不能重复添加
     private EduSubject existOneSubject(EduSubjectService subjectService,String name) {
         QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
         wrapper.eq("title",name);
         wrapper.eq("parent_id","0");
         EduSubject oneSubject = subjectService.getOne(wrapper);
         return oneSubject;
     }

      //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        System.out.printf("Hellow");
    }
}